exam Maths Puzzle Numerical Ability

Find two numbers whose difference is 3 and whose product is a minimum?

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exam Other Question

(x/5x+10)+((x-3)/(x+2))=7/5

Solve for x x+3(divisor) divided by 5xcubed+5xsquared-32x-10 (dividend). Not sure how to work out this problem in long division.